Lesson Plan: Percentage Composition Chemistry • First Year of Secondary School

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to calculate the percentage composition of a substance using chemical formulas or the masses of constituent elements.

Objectives

Students will be able to

recall the definition of the atomic mass of elements,
recall how to calculate the formula mass of a compound,
identify the relevant mathematical formula for expressing the mass of a component as a percentage of the total mass,
calculate the percentage composition of a compound based on its elemental masses,
calculate the percentage by mass of a compound within a substance.